bagworm

noun bag·worm \ -ˌwərm \

Definition of bagworm

: any of a family (Psychidae) of moths with wingless females and plant-feeding larvae that live in a silk case covered with plant debris; especially : one (Thyridopteryx ephemeraeformis) often destructive to deciduous and evergreen trees of the eastern U.S.

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First Known Use of bagworm

1811

in the meaning defined above

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